Elevator.



Patented Oct. l6, I900. P. D. ROOT.

E L E V AT 0 R (Application filed Apr. 26, 1 900.

2 Sheets-Shaet 1.

av VENTOH Parley llRaot WITNESSES 'mz NORRIS versus cc. wurouwa, WASHiNOYDN. n. c

No. 659,988. Patented Oct. l6, I900.

P. 0. mm.

ELEVATOR.

(Application filed Apr. Q6, 1900.) (N0 Modal.) 2 Sheets-Sheet 2.

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PARLEY D. ROOT, OF WAKEFIELD, RHODE ISLAND.

IELEVATO R.

SPECIFICATION forming part of Letters Patent No. 659,988, dated October 16, 1900.

Application filed April 26, 1900. Serial No. 14,440. (No model.)

To ztZZ whom it may concern:

Be it known that I, PARLEY D. R001, a citizen of the United States, and a resident of lVakefield, in the county of lVashington and State of Rhode ls1and,have invented a new and useful Improvement in Elevators, of which the following is a full, clear, and exact description.

One purpose of the invention is to provide safety-doors for elevator and other shafts, and a car which travels in the shaft, the doors at the floors of the shaft and the door in the elevator being independently mounted and yet so arranged that while the shaft and elevator-car doors are closed the car may freely pass up and down the shaft, but when the car is stopped at a floor audits door is opened the door in the shaft at that floor will be simultaneously opened, as the two doors will at that time be brought into interlocking engagement and one will operate the other.

Another purpose of the invention is to provide a construction whereby the doors in the shaft cannot be opened from a landing or room, and the movement of the door of the car in one or the other direction will automatically open or close and unlock and lock the shaft-door at any one floor.

A further purpose of the invention is to provide a construction which will positively prevent the movement of a car up or down during the time the door is open or even partially open.

Another purpose of the invention is to provide a construction whereby the door of the car cannot be opened until the car is brought to a full stop and at a floor, and the door at such floor is opened simultaneously with the door of the car, as the door of the car and the door in the shaft will at that time be brought into interlocking engagement and the two doors will slide together on suitable rails, while projections from the doors will at such time prevent the car from moving up or down.

The invention consists in the novel construction and combination of the several parts, as will be hereinafter fully set forth, and pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of referenceindicate corresponding parts in all the figures.

Figure 1 is a front elevation of a portion of an elevator-shaft, various floors being shown in section. Fig. 2 is a vertical section through a portion of an elevator-shaft having the improvements applied and a section through the car, which is shown at rest at one of the floors, the car-door being closed. Fig. 3 is a horizontal section taken through the elevatorshaft and through the car, the section being taken about midway between floors. Fig. 4 is a front elevation of the car. Fig. 5 is a horizontal section through a portion of the elevator-shaft and a door provided for the shaft, illustrating the latch for the said door, the latch being in looking engagement with the door; and Fig. 6 is a View similar to Fig. 5, showing also a partial horizontal section through the door of the car and illustrating the manner in which the latch for a shaftdoor is automatically carried out of engagement with said door through the medium of the car.

A represents an elevator-shaft; B, floors through which the shaft passes, and C represents the door of the car D, traveling in the shaft, which car is supported by the usual rope or cable 10. The door 0 is adapted to close the passagewayll leading into the car, and the shaft is provided with openings 12, which openings are normally closed by doors 0, which doors can be opened only through the medium of the car-door. The car-door O is held to travel in tracks 13, located at the top and bottom of the front portion of the car, the tracks being substantially U-shaped in cross-section, and the tracks are provided with suitable friction-rollers 14, so that the door may move with the least possible resistance. A knob 15 orahandle of any kind is secured to the inner face of the cardoor at or near the edge, which is adjacent to the closing-jamb of the entrance-opening 11..

Any suitable latch may be provided for the car-door, but usually a simple spring 16, of slight resistance, is attached to the closingjamb of the car and enters a recess in the inner face of the car-door, as illustrated in Fig. 3. The spring 16 thus forms a frictionlatch, which looks and releases as the door is closed or opened. The outer face of the cardoor is provided at each longitudinal edge with a rib 17, and these ribs extend from one track .13.to the (other. The rib .whichiis adjacentitotheclosing-jamb of the entrance-. opening 11 is provided with an offset 18, adapted to release the latches for the doors. C of the elevator-shaft, as will be hereinafter described. Openings l9 .and 19*,aremade in opposite side walls'ojf the -passage-- opening 11 of the car, which recesses are adapted to receive the knob or handle 1510f the door, and thus permit the door of the car to fully uncover or to completely close the opening ll. I

Each shaft-door O is located at the inner face of the front wall ofthe shaft Zi -and each door 0 is made of such size that it will fit in the space between the ribs 17 ofthecar-door C,-as shown in "Fig. 3. Each shaft-doorG' is provided'with a longitudinal :rib 20 upon:its inner face at or near its vertical edgesyand. these ribs are adapted to engage with-.orto lie between theribs 17 on the car-door.

The shaft-doors ()"travel in tracks ,E, '10-" cated at the top and bottomportion ofa'floor at the inner front face ofrthe shaft A. These; tracks are preferablyU-shaped incross-sec-E tion and are provided with friction-rollers 21.5 The tracks E are made in two sections 22 and? 22 as illustrated in Fig.2. A-space 23 is? provided betweenthe inner ends ofthe sec-; tions 22 and 22 of the track, and another? space 24 is provided between the outer'endi ofeach track-section 22 and what may .bef termed the closing-jambs -of'-the openings; 12 in the shaft A. These openings 23 and; 24 are so placed that when the car-door'G. is closed the ribs '17-of this door will enter the openings 23 and 24, thus permitting the car-D to travel freely up or down :theshaft' while the doorsa're closed; but when a cardoor is opened at a floor, as-stated itisin lockingengagement with the shaftsdoor O" at that =fioor, and upon opening a car-doorO the shaft-doorO is opened a1s0,-and the ends o'f the ribs of the doors'at suchtimeawill -be brought in engagement with the opposing horizontal edges of the upper and lowertracks atthe floor, and the car will consequently-be held against movement either upward or downward.

The shaft-doors C are normallyclosed by latches 26, preferably of .a'spring character; which latches are located in 1'ecesses25, produced-in the inner faces oftheclosing-jambs' ofthe door-openings 12 in the shaft, as shown: in Figs. 5 and 6, in whichithelat-ch'isshown at its free end as provided withztwo projections 27and 28, and these projections normally enter openings" 29,produced in akeeperplate 30,-which keeper plates are attached to the .outer faces of the -shaft-doors"C"andi are concealed by the jamb of the opening 12 when the door isclosed. The latches 26' are-automatically released'from engagement. with theshaft-doors when the car reaches? a:positionbetweenthe-upper andilowerzwalls of the floor, and this release is effected by the offset 18 on one of the ribs of the cardoor Omeetingan offset 31 ona latch'26 and forcing the'latch outward, as shownin Fig. 6.

The doors of the shaft and the car cannot be opened unless they are moved simultaneously, as one operates the other, and such operation takes placeon ly when the car is in "position foringress or egress between floors.

Having thus described my invention, I

claim.- as new and desire to secure by Letters "Patent- 1. In an elevator, a shaft provided with horizontal .tracks,.adoor rfor :theshaft, slidable in said tracks, a car, and aslidable door for the-cansaid'car' door having an interlock- "ing engagement with the shaft-door when brought opposi'te th-esaid 'doorand adapted to slidetherewith between and-in'toengagem'ent with the tracks of'the shaft-door, substantially. as 'and for th'e *purposes set forth.

2. In an elevator, a "shaft 'provided with horizontal tracks a door for'the shaft, slidable-in-said tracks, a car, and'a-doorfor the car, the said doors each being provided with longitudinal ribs of less l-engththan the doors and adaptedtoihterlock when the doors are brought-opposite each other, to permit the doors to slide together'with the ribs of the car-door between the said tracks, whereby the car will :be locked'against movement, as setforth. 3. In an elevator, the combination of a shaft having-horizontal tracks, a door for the shaft slidable =in said tracks, a spring-latch for the door,-a car -a door for the car, said doorhaving an'interlocking engagement with thedoo'r ofthe shaft when-brought opposite it and adapted to slide therewith between and into engagement with the said tracks, and a :projectiononthe car-door for-engaging the latch-of the-sh'aft-doorto releasethe latch, substantially as described.

4. In elevators, ashaft, a slidabledoor'for the shaft, having ribs' formed upon=its-inner face, the tracks for the door having-spaces between them and between their ends and the jambof the door-opening, a car provided with a slidable door, having ribs u pon its outer face, which ribs are adapted to extend ateach side of theoutersurfaces of theribs on-the shaft-door, the ribs on the car-doorbeing so placedthat when :the car-door is closed the saidribswilhbe in'vertical alinement with the said spaces, and'when-the car-door is opened the ribs will engage with-the saidtracks, as

described.

itsouter face, which ribsare adapted toextend at each side ofthe outensurface of the ribs on the shaft-door, the ribs on' the cardoor'being-so placed that when the-car-door is closed'the ribs'willbe in Vertical alinenlent withthesaidspaces, and when the car-door is IIO opened the ribs will engage with the said tracks, a concealed latch for the shaft-door, and a trip carried by the elevator-oar and adapted for engagement with the said latch, as and for the purpose set forth.

6. In an elevator, the combination with a shaft-door, and a car-door, said doors having interlocking ribs to permit them to move together, of a spring-latch for locking the shaftdoor, and a projection on a rib of the cardoor for engaging the latch to release it, substantially as described.

7. In an elevator, the combination with a shaft having horizontal tracks, a door for the shaft adapted to slide in the tracks and having longitudinal ribs, and a spring-latch for PARLEY D. ROOT.

Witnesses:

ELMER E. BOOTH, FREDK. G. OLNEY. 

